TW201033976A - Display and driving apparatus and method thereof - Google Patents

Abstract

A display and driving apparatus and a method thereof for a display are provided. The method includes the following steps of firstly obtaining a basis gray level of a frame signal, and secondly obtaining a brightness minimum value corresponding to the basis gray level, wherein the brightness minimum value changing with the basis gray level, and then adjusting the brightness of a backlight source corresponding to the frame signal according to the value of the dynamic ratio, wherein the brightness of the backlight source being larger than or equal to the brightness minimum value, so as to avoid the flicker phenomenon.

Description

f. \f V ^ 1 28648twf.doc/n VI. Description of the Invention: [Technical Field] The present invention relates to a flat display technology and, in particular, to avoiding a flicker phenomenon that is visible to the human eye in a display The driving device and driving method, and the display to which the device is applied. [Prior Art] With the evolution of optoelectronics and semiconductor technology, the development of flat panel displays has been promoted. In many flat panel displays, liquid crystal displays have advantages such as high space utilization efficiency, low power consumption, no radiation, and low electromagnetic interference. Characteristics have become the mainstream of the market. The liquid crystal display generally includes a liquid crystal display panel and a backlight module, and since the liquid crystal display panel itself does not have self-luminous characteristics, the liquid crystal display panel must be provided with a backlight module to provide a surface light source required for the liquid crystal display panel, such a liquid crystal display. The image can be displayed to the user for viewing. In today's liquid crystal displays, in order to improve the contrast, the brightness of the back wire source emitted by the backlight module is adjusted to improve the dark state (lowest gray scale value) displayed by the liquid crystal display device. Grayscale value) The view between the faces. In general, in order to improve the contrast of the liquid crystal display, the method of lowering the brightness of the surface is as follows. For example, when the liquid crystal display is cumbersome, the brightness of the face is · ed/m2, and the true state of the dark surface is 0·5 cd/m, the comparison at this time is 1000 (ie 500 + 〇 5 2 1〇ϋ... slTutlo °·1 Cd/m2 5 (ie. Also, increase the liquid crystal through 3 201033976, on vww ...iZITW 28648twf.doc/n light rate' to compensate for the brightness of the display before dimming the backlight source In the real world, the brightness of the backlight source can be dimmed, and the light leakage generated by the liquid crystal display in the display & state can be solved, and the energy saving effect can be achieved. However, the backlight module will flicker after dimming (flicker). The situation of the image, and the darker the backlight module, the more obvious the phenomenon of flickering. When the liquid crystal display is displaying the low-gray scale, the human eye is less likely to notice the phenomenon of flickering. In the grayscale picture, the phenomenon of flickering is easily noticed by the human eye, so that the display effect of the liquid crystal display is greatly reduced. SUMMARY OF THE INVENTION In view of the above, the present invention provides a driving device and method for a display, which can effectively solve the display in The present invention provides a driving method for a display, comprising the following steps: First, obtaining a reference grayscale value of a facet signal. Then, obtaining a brightness corresponding to one of the reference grayscale values The lower limit value and the brightness lower limit value are changed according to the reference gray level. Then, the brightness of one of the backlight sources corresponding to the kneading surface signal is adjusted according to a dynamic contrast value, wherein the brightness of the backlight source is greater than or equal to the brightness lower limit value. In an embodiment of the invention, the step of obtaining the lower limit value of the shell corresponding to the reference gray scale value comprises: obtaining a lower limit value of the brightness via a lookup table, wherein the lookup table has a lower limit value and a reference gray scale value. Corresponding relationship. In an embodiment of the invention, the driving method of the display further comprises: first obtaining a voltage multiplication upper limit value corresponding to the reference gray scale value, 2〇1〇33976_w 28648twf.doc/n voltage The upper limit of the magnification varies with the reference gray scale value. Then, according to the dynamic contrast value, one of the pixel voltages corresponding to the kneading signal is adjusted to adjust the corresponding signal of the kneading signal. The voltage, wherein the pixel voltage multiplying factor is less than or equal to; the upper limit value of the electric power. In an embodiment of the invention, the step of obtaining the voltage multiplying upper limit value corresponding to the reference grayscale value further comprises: via a lookup table Acquire voltage

The upper limit of the magnification, the lookup table has a correspondence relationship between the upper limit of the voltage multiplier and the reference grayscale value. In an embodiment of the invention, the step of obtaining a reference grayscale value of the kneading signal comprises. The search displays the highest grayscale value of the face as the reference grayscale value. In an embodiment of the invention, the step of obtaining the reference grayscale value of the facet signal comprises: calculating an average grayscale value of the displayed facet as the reference grayscale value. In an embodiment of the invention, the driving method of the above display is adapted to drive a liquid crystal display.

The present invention provides a driving device for another display, including a driving unit, a backlight module driving unit, and a controller. The driving unit is coupled to a display panel for driving the display panel. The backlight module driving unit is lightly connected to a backlight module for driving the backlight module to generate a backlight source. The controller is coupled to the driver and the backlight module driving unit, and the controller is configured to obtain a reference grayscale value of a picture signal, and obtain a corresponding brightness lower limit value according to the reference grayscale value. The grayscale value changes. Wherein, when ^ 5 201033976 -------- iiZITW 28648twf.doc / n controller according to - (four) contrast value adjusts the kneading signal corresponding to - the backlight source of the party degree when the brightness of the H wire is greater than or # brightness lower limit. In an embodiment of the invention, the controller further includes a lookup ^' for obtaining a luminance T limit value, and the lookup table has a correspondence relationship of grayscale values under luminance. +

In the embodiment of the present invention, the controller further takes the upper limit value of the voltage-magnification ratio according to the reference gray scale value, and the upper limit of the material 镰 the reference gray scale value 2 'when (4) ϋ according to the meaning of the contrast value, the corresponding signal of the difficult surface signal When the voltage corresponding to the voltage material is light, the voltage ratio of the halogen is less than or equal to the upper limit of the voltage multiplier. In an embodiment of the invention, the controller further includes a lookup to obtain a "magnification ratio", and the surface table has a correspondence relationship between the Xia times limit value and the reference gray scale value. In the present invention, the control n is a timing controller. In an embodiment of the invention, the driving device is adapted to drive a liquid. From another point of view, the present invention further provides a display comprising: no panel, _ unit, backlight amount, back wire group _ unit and control. The e-unit is coupled to the display panel for driving the display panel, and the backlight north group drives the single-ply backlight module to drive the backlight module to generate the moonlight H secret to the unit and the backlight module driving unit. Face (4) - the reference gray scale value, the silk county quasi-gray value component corresponding to - the brightness down, the above brightness lower limit value changes with the reference gray value 'the towel as the control test - the dynamic contrast value adjusts the picture signal 6 201033976娜28648twf.doc/n The brightness of the light source is greater than or equal to the brightness of the backlight source. When the display is adjusting the back source, the corresponding brightness lower limit value τ is found and the mouth is first The redundancy, or 疋 when adjusting the transmittance of the display, depends on the voltage of the % signal to limit the corresponding voltage multiplier, and adjust the pixel voltage accordingly. In order to make the above-mentioned special advantages of the present invention more obvious and easy to understand, the following specific embodiments will be described in detail below. Flying [Embodiment] The present invention is mainly for the purpose of effectively avoiding (4) adjusting the backlight source by adjusting The dynamic contrast value is an image that is perceived by the human eye, and the following content will be described in detail for the technical features of the present invention and the functions to be achieved, so as to provide details to those skilled in the related art of the present invention. The system block diagram of the display 100 according to an embodiment of the present invention. Referring to the figure, the display 1 of the present embodiment is exemplified by a liquid crystal display (LCD), and includes a liquid crystal. An LCD panel HH, a backlight module, a backlight module 103, and a driving device 1〇5 composed of a controller 1〇7, a driving unit ln and a backlight module driving unit 113. The controller 1〇7 is, for example, a timing controller (T-con), and the backlight source in the backlight module 103 is, for example, a cold cathode fluorescent tube (Cold Cathode 2〇l〇33976). zlTW 28648twf.doc/n

The light source formed by the Fluorescence Lamp (CCFL) includes a gate driver and a source driver (not shown) in the driving unit m. The driving unit is connected to the liquid crystal display panel and controlled by the controller 1〇7 for inputting the kneading signal to the halogen capacitor in the liquid crystal display panel 101. The backlight module driving unit 113 is coupled to the backlight module 1〇3 and controlled by the controller 107 for driving the backlight module 103 according to the light source signal 1S1 output by the controller 107. The backlight module driving unit 113 includes a pulse width modulation unit and a transformer. The backlight module driving unit 113 adjusts the brightness of the backlight source according to the received light source signal LSI outputting a pulse width modulation (PWM) signal LS2. In general, the duty cycle LSr dimming cyde of the pulse width modulation signal LS2 corresponds to the brightness of the backlight source in the backlight module 103. For example, the brightness of the backlight produced by the backlight module 1〇3 at an effective period of 5〇% will be half of that when the effective period is 100%. The four-level gray scale value in the liquid crystal display panel 101 is determined by the pixel voltage of the driving unit iπ and the brightness of the backlight module 1〇3. In general, the higher the material pressure, the higher the filament of Wei Jing, and the higher the gray scale value. When displayed! 100 wants to change its dynamic contrast, usually adjust the contrast value according to the -dynamic contrast value 'by two ways, respectively, adjust the pixel voltage multiplier, south or reduce the pixel voltage' and adjust the brightness of the backlight module 103 . For example, if you want to get 10 times or more of the _, you can adjust the brightness of the backlight module 103 to the original 1/1 在 when displaying the low-gray 昼 face (ie, the pulse width modulation signal LS2 is valid. The period is adjusted to the original 1/1〇) or when the high-gray aspect is displayed, the voltage of the halogen is increased to increase the contrast (that is, the pixel voltage 201033976 tiZITW 28648twf.doc/n is adjusted to increase the voltage of the pixel) . Of course, the above two methods can be used simultaneously. However, when the brightness of the backlight module 103 is too low, flickering may occur, and under a fixed backlight brightness, if the gray level displayed by the surface is too high (ie, the pixel voltage is over) High), there will also be flicker. Therefore, in the embodiment, when the controller ι 7 adjusts the brightness of the backlight source corresponding to the kneading signal according to a dynamic contrast value, the brightness of the backlight source is greater than or equal to the brightness lower limit value, and When the pixel voltage corresponding to the 昼 φ plane signal is adjusted, the voltage is multiplied or equal to a voltage multiplication upper limit value. In this way, it is ensured that under different gray scales, no matter whether the backlight brightness or the pixel voltage multiplier is adjusted, no flicker flicker is generated. ° The above brightness lower limit value and voltage multiplication upper limit value can be used to look up the table. It is stored in the controller 107 or in the memory of the display 1〇3, and the embodiment is not limited. As for the value setting in the lookup table, it depends on the different display models and the needs of the user. Since the flicker phenomenon is a phenomenon that is perceived by the human eye, it is possible to obtain the gray scale (voltage magnification) of the face that can be accepted by the human eye under different backlight brightness in spring by experimental numerical values and statistical analysis. The experimental method of determining the lookup table mainly includes the following three steps. First, under different gray-level exemptions, the human eye will feel the kneading grayscale value of the kneading surface, and then the light measuring device is used to measure the time. The difference in brightness is made and made into a reference table. Then, the brightness of the backlight module 1〇3 (ie, the effective period of the pulse width modulation signal LS2) is sequentially adjusted, and the gray scale value of the signal is changed, and the corresponding backlight brightness can be found by using the above reference table. Ash 201033976

iiZITW 28648twf.doc/n Upper limit of the order. Finally, the upper limit of the gray scale corresponding to the brightness of the different backlights (which can be said to be the lower limit of the backlight brightness corresponding to different gray scales) is used as the optimum value of the backlight brightness and the pixel signal required to establish the dynamic backlight technology.

The numerical values of the above look-up table can be graphically represented as shown in Fig. 2. Fig. 2 is a graph showing the effective period of the pulse width modulation signal L S 2 and its reference gray scale value according to an embodiment of the present invention. In FIG. 2, the curve 210 is a combination of different reference gray scale values and effective periods, each point representing the display 1 〇〇 displaying a combination of different reference gray scale values and an effective period, and the reference gray scale value in FIG. 2 is Calculated by the kneading signal, it can be used to indicate that the gray level of a picture is the cloth state. In addition, the calculation of the reference grayscale value is, for example, the grayscale mean of all the pixels in the facet, the highest grayscale value in the facet, or the grayscale weighted average of the different zones j. In addition, it is also possible to determine the reference grayscale value by using the secret image technique. This embodiment does not limit the generation of the reference grayscale value.

When adjusting the backlight brightness of the face, if it is located in the upper part of the curve, it is not = the human eye can detect the phenomenon, and the area below the curve = the combination of the human eye can detect the phenomenon. For example, when the display period of the display is 60%), the collar is not programmed as 150 and has an image. - The appearance of mi will appear in the human eye to detect the brightness of the backlight source corresponding to the flashing, and the reference m month, under, the loyalty of the loyal dragon von from the ancient times by the average person For the brightest eyes that will not be noticeable to the human eye _ phenomenon 201033976

iZITW 28648twf.d〇c/n degrees, the second regulator 100 dims the backlight source from the operating point 6: C, straight for 2 periods (for example, it will display 100 operations in the operation "blinking 杳: 丨; The effective period corresponding to the lower limit of the human eye appears as the flicker phenomenon detected by the second period. 頋Do not appear in the human eye e ratio. In the embodiment, when the controller 107 reads the value according to the dynamic value, the 4 will be based on the current The surface reference grayscale value determines === adjusts the brightness of the backlight tree, limiting the problem of backlighting. ',,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, When the magnification is used, the value of the north-surface b of the kneading signal will change due to the adjustment of the voltage of the element. If the production is set to 'when the displayed gray scale value is too high, the corresponding value is adjusted according to the dynamic contrast value. The pixel voltage multiplier has an upper limit value for adjusting the pixel voltage corresponding to the picture signal, and the pixel voltage rate must be less than or equal to the upper limit of the voltage multiplier. 〇月>,,,, Fig. 3, 3 is a graph according to an embodiment of the invention: a graph of its gray scale value. 3 is based on the lookup table, which is the base corresponding to the fine-turned money, and the curve is the upper limit of the prime surface magnification under different reference gray s. When the adjusted pixel voltage is in the curve When the top of 310 is above, the problem of facet_ is generated. Therefore, in the present embodiment 11 201033976 tiZITW 28648twf.doc/n, when the controller 107 adjusts the prime voltage ratio corresponding to the kneading signal according to the dynamic contrast value to adjust When the pixel voltage corresponds to the pixel voltage, the voltage multiplier is limited to the lower side of the curve 310 to avoid the occurrence of a flashover problem. ^ ^

Further explained, for example, when the display 100 is operated at the operation point D in Fig. 3 (i.e., the display reference grayscale value is 150 and the pixel voltage component rate is 1), the display 100 does not exhibit human-appreciable flicker. : When the display 100 operates at the operating point E, that is, in the case where the pixel voltage multiplier and the gray scale value is 150, the pixel voltage multiplier at this time is the upper limit of the voltage magnification that does not cause the human eye to perceive the flicker phenomenon. value. If the device 100 increases the transmittance from the operating point E, that is, increases the pixel voltage multiplier ^ ^ If the display 100 is operated at the operating point F, and its pixel power is 1-5), the display 100 will The human eye can detect flickering. Therefore, the voltage multiplying upper limit value of the display 1 可以 can be set according to the voltage multiplication upper limit lookup table to prevent the display 100 from being perceived by the human eye to flicker. It can be seen from the disclosure of the prior art that when the liquid crystal display is in the dynamic contrast value, if the backing wire group (10) emits a low level of light, that is, it is still in the lower effective Zhou Lin, there will be a phenomenon. . If the light transmittance of the liquid crystal display panel 101 is too high, that is, the voltage of the four elements used to adjust the pixel voltage is too high, 'the same age makes people feel this flash phenomenon. In other words, when the display 100 adjusts the dynamic contrast, if When the degree of freedom of the backlight source is too low or the light transmittance is too high, it will be easy to simultaneously display the flicker that is perceptible to the human eye. ', 12 201033976 --------t-ZlTW 28648twf.doc/n In view of the fact that this embodiment will adjust the dynamic contrast value on the display 1 'the controller 107 first obtains a face signal The reference gray scale value, and = the lower limit of the brightness of the job reference - the lower limit of the brightness, the lower limit of the brightness varies with the reference gray scale value, and then the controller adjusts the backlight signal according to a dynamic contrast value - the backlight source The brightness of the backlight source is greater than or equal to the brightness lower limit.匕 More specifically, the controller 1〇7 will automatically find the reference grayscale corresponding to the reference grayscale in the lookup table of the backlight luminance after obtaining the reference grayscale parameter of the kneading signal to adjust the brightness of the backlight source. To the corresponding brightness. Or find the upper limit of the pressure ratio corresponding to the reference gray scale from the look-up table of the upper limit of the voltage multiplication and set the pixel voltage multiplier to adjust the denier voltage of the kneading signal, where the pixel voltage multiplier is less than or equal to the voltage multiplying ratio. Limit. In this way, the display 1 can be prevented from displaying the flickering phenomenon perceived by the human eye, and the effect of adjusting the dynamic contrast value can be achieved. In the following, based on the contents disclosed in the above embodiments, the following will be directed to a driving method that is not stolen to those of ordinary skill in the art. FIG. 4 is a flow chart showing a driving method of a display according to an embodiment of the present invention. Referring to FIG. 4, first, in step S41, a reference grayscale value of a facet signal is obtained. Thereafter, in step S420, a luminance lower limit value corresponding to one of the reference "grayscale values is obtained, and the luminance lower limit value is changed according to the reference grayscale value. Finally, in step S430, the brightness of the backlight source corresponding to the kneading signal is adjusted according to a dynamic contrast value, wherein the brightness of the backlight source is greater than or equal to the lower limit value. 13 bZITW 28648twf.doc/n 201033976 This =, after obtaining the reference gray scale value, # to the reference gray scale (four) - electricity (four) rate on the thief, ^ one * Xin electric chest to adjust the kneading signal according to the state contrast value In order to adjust the pixel voltage corresponding to the picture signal, the voltage of the pixel in the basin is equal to the upper limit of the voltage multiplier. 8. The above-mentioned brightness lower limit value or voltage multiplication upper limit value can be obtained from the miscellaneous table according to the reference fire level value. After obtaining the brightness lower limit value or the voltage multiplication rate, the brightness of the moonlight source is adjusted according to the brightness lower limit value or the voltage magnification upper limit value, or the pixel voltage is adjusted, so that the adjustment state can be ensured. When comparing values, it is effective to avoid the appearance of a clear picture. For the remaining details of the driving method of the display according to the present embodiment, reference is made to the description of the above embodiments, and will not be described here. In summary, when the display is adjusting the backlight, it can be based on the 俨 俨! The !fi grayscale value finds the corresponding brightness lower limit value from the lookup table, and according to the U and the moonlight redundancy, or when adjusting the transmittance of the display, the reference grayscale value is based on the upper limit of the voltage ratio of the written signal. Find the corresponding voltage override = value and adjust the pixel voltage accordingly. In this way, when the display adjusts the contrast value, it can effectively avoid the flicker that the human eye can detect. Although the present invention has been disclosed in the above embodiments, it is not intended to limit the scope of the present invention, and it is possible to make a few changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims. 14 201033976, Z1TW 28648twf.doc/n [Simple Description of the Drawings] FIG. 1 is a block diagram of a system shown by a display 100 in accordance with an embodiment of the present invention. 2 is a graph showing an effective period of a pulse width modulation signal and a reference gray scale value thereof according to an embodiment of the present invention. 3 is a diagram showing a voltage ratio of a halogen element and its base force according to an embodiment of the present invention.

Order value graph. A soil/X FIG. 4 is a flow chart showing a driving method of a display according to an embodiment of the present invention. [Main component symbol description] 100: Display 101. Liquid crystal display panel 103: Backlight module

105: drive device 107: controller 111: drive unit 113. backlight module and drive unit 210, 310: curve S410 to S430 process steps of the display method of the display according to an embodiment of the present invention

Claims (1)

201033976通w 28648twf.doc/n VII. Patent application scope: 1. A driving method for a display, comprising the steps of: obtaining a reference grayscale value of a surface signal; obtaining a brightness corresponding to one of the reference grayscale values a limit value, the brightness lower limit value is changed according to the reference gray scale value; and adjusting a brightness of the backlight source corresponding to the face signal according to a dynamic contrast value, wherein the brightness of the backlight source is greater than or equal to the brightness lower limit value. 2. The driving method of the display according to the invention of claim 2, wherein the step of obtaining the brightness lower limit value corresponding to the reference gray scale value comprises: obtaining the brightness via a lookup table a lower limit value, the lookup table having a correspondence relationship between the brightness lower limit value and the reference gray scale value. 3. The driving method of the display as described in the patent application item i includes: Obtaining a voltage multiplying upper limit value corresponding to the reference gray scale value, the voltage multiplication upper limit value is changed according to the reference gray scale value; and adjusting a pixel voltage multiplication corresponding to the kneading surface signal according to the dynamic contrast value (4) The whole picture of the letter is written by Lai Lai, whose voltage multiplier is less than or equal to the upper limit of the voltage multiplier. ^ If the application method (4), the _ (four) crane method is described, the step corresponding to the upper limit of the rate of the reference gray scale value is obtained by the step - the lookup table, the lookup table has 16 c, Z 1TW 28648twf.doc/n 201033976 The corresponding relationship between the upper limit value of the voltage multiplier and the reference gray scale value. 5. The display of the signal according to the item described in the item of claim No. The step of the reference gray scale value = bracketing, f finds the highest gray scale value of the pupil surface as the reference gray scale value. The reference of the driving side / surface signal of the display described in the first item of the patent scope The steps of the grayscale value include: ❹; such as the average grayscale value as the reference grayscale value. The driving method of the display in the method 'f is suitable for driving - liquid two = dynamic 8. A driver of the display The device includes: = coupled to a display panel for driving the display panel, and a backlight module driving unit coupled to a backlight module for driving the moonlight mode, and generating a backlight source; The second brightness limit value is determined by the controller. When the dynamic contrast value adjusts the brightness of the surface light source of the kneading surface, the brightness of the backlight source is greater than or equal to the lower limit of the temperature. 9 The controller of the display device of the display device of claim 8 is applied. The method further includes a lookup table for obtaining the lower limit of the brightness, and the lookup table has a correspondence relationship between the brightness lower limit value and the reference gray level value. 17 Z1TW 28648twf.doc/n 201033976 Department, ^° towel 5 stomach patent model (four) 8 The driving device of the display 11 of the item, /, the butterfly n is based on the secret gray scale value limit, the voltage multiplication upper limit value is associated with the reference gray; the controller adjusts the written letter according to the dynamic contrast value = 仵The rate is equal to the upper limit of the voltage multiplier when the pixel voltage corresponding to one of the pixel voltages of the two digits is equal to the current pixel voltage. Lu Xun H. As set out in the scope of claim 10, the controller further includes an upper limit of the driving load of the 杳 矣 矣 兮 兮 兮 兮 兮 兮 兮 共 共 共 共 共 共Correspondence of voltage multipliers. Limits and benchmarks The grayscale value is set to 12. According to the scope of the patent application, the controller is a timing controller; the driving of the display of the display is 13. The application device is suitable for driving in the f4 of the patent application range. The liquid crystal display V! benefits the driver 14-type display, including: a display panel; - a driving unit, the display panel, a backlight module; a body display panel; a backlight module driving unit, coupled The backlight module is configured to generate a -f light source; the ^ μ module is configured to drive the controller to the pure controller unit, and the controller is configured to obtain the reference gray scale value of the optical module driving the document. Obtaining a reference gray scale value of the relative ^, and the root value becomes redundant and lower limit value according to the reference gray scale value, and the lower limit of the brightness is 18 201033976 — ZITW 28648twf.doc/n wherein when the controller is based on a dynamic When the contrast value adjusts the brightness of the backlight source corresponding to the face signal, the brightness of the backlight source is greater than or equal to the brightness lower limit value. 15. The display of claim 14, wherein the controller further comprises a - lookup table for obtaining the brightness lower limit value, the search having a correspondence between the brightness lower limit value and the reference gray scale value relationship. 16. The display of claim 14, wherein the _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The ^ = ratio adjusts the pixel voltage multiplication corresponding to the kneading signal to adjust; when the pixel signal corresponds to the pixel voltage, the pixel voltage multiplier is less than = the upper limit of the voltage multiplier. 4 find. Π. For example, please refer to the patent _ f 16 Gu Shuzhi display, in which the benefit includes a - lookup table to obtain the upper limit of the electric rate, and the lookup table has the voltage multiplier on the corresponding gray scale _ corresponding ^: Lu 18·If you want to cover the scope of the patent, 帛 14 items of the escaped display, in which the thief is a timing controller. '^控 19